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Table 4 Opening distance and angle of the osteotomy gap during two operations

From: Salvage of severe knee osteoarthritis: efficacy of tibial condylar valgus osteotomy versus open wedge high tibial osteotomy

 

HTO

TCVO

p value

△MPTA (°)

7.9 ± 2.3

9.3 ± 3.2

< 0.05

Opening distance (mm)

10.1 ± 2.9

14.0 ± 4.5

< 0.01

Opening distance per â–³MPTA (mm)

73.6 ± 4.1

86.4 ± 2.7

< 0.01

Opening angle (°)

9.3 ± 2.5

19.1 ± 5.8

< 0.01

Opening angle per â–³MPTA

1.2 ± 0.1

2.1 ± 0.2

< 0.01

  1. △MPTA the change of MPTA after each surgery (△MPTA = post-operative MPTA−pre-operative MPTA), opening distance the distance between the intersections of the osteotomy lines with the medial cortex during gap opening, opening distance per △MPTA = opening distance × 180÷(△MPTA × π), opening angle the angle formed between two osteotomy lines after osteotomy gap opening, opening angle per △MPTA = opening angle ÷ △MPTA
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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X